Big Space Dreams (2/2)

Finally, everything was in place. 

Bala Gangadhar quickly poured all the Sambrani into a container and lit them all at the same time. He kept the container on a table, and behind the container, he placed the hand-operated fan.

"I figured out this trick during my university days. This is how I used to pinpoint the placement of the fins." 

As he said that, smoke started to rise in large quantities from the container. Bala Gangadhar realized that this was the right time and quickly turned the hand-operated fan. 

The smoke got sucked into the fan and was immediately directed into the cupboard where the firework was placed. 

The paper strips began to react in different ways to the airflow, and the smoke, white in color, was cut into precise shapes as it curved around the firework. 

The mouths of all the scientists were open—this was the first time they had seen a flow being visualized in such a direct and hands-on way.